diff --git a/Changelog.md b/Changelog.md
index a70f662..9519abb 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -7,6 +7,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+
+- Added support for Swift 5.4 and 5.5.
+  #12 by @compnerd and @mattt.
+
 ## [0.2.0] - 2020-11-11
 
 ### Added
diff --git a/Package@swift-5.4.swift b/Package@swift-5.4.swift
new file mode 100644
index 0000000..a3fc35c
--- /dev/null
+++ b/Package@swift-5.4.swift
@@ -0,0 +1,33 @@
+// swift-tools-version:5.3
+// The swift-tools-version declares the minimum version of Swift required to build this package.
+
+import PackageDescription
+
+let package = Package(
+    name: "SwiftSemantics",
+    products: [
+        // Products define the executables and libraries produced by a package, and make them visible to other packages.
+        .library(
+            name: "SwiftSemantics",
+            targets: ["SwiftSemantics"]
+        ),
+    ],
+    dependencies: [
+        // Dependencies declare other packages that this package depends on.
+        .package(name: "SwiftSyntax",
+                 url: "https://github.com/apple/swift-syntax.git",
+                 .revision("release/5.4")),
+    ],
+    targets: [
+        // Targets are the basic building blocks of a package. A target can define a module or a test suite.
+        // Targets can depend on other targets in this package, and on products in packages which this package depends on.
+        .target(
+            name: "SwiftSemantics",
+            dependencies: ["SwiftSyntax"]
+        ),
+        .testTarget(
+            name: "SwiftSemanticsTests",
+            dependencies: ["SwiftSemantics"]
+        ),
+    ]
+)
diff --git a/Package@swift-5.5.swift b/Package@swift-5.5.swift
new file mode 100644
index 0000000..65acbee
--- /dev/null
+++ b/Package@swift-5.5.swift
@@ -0,0 +1,33 @@
+// swift-tools-version:5.3
+// The swift-tools-version declares the minimum version of Swift required to build this package.
+
+import PackageDescription
+
+let package = Package(
+    name: "SwiftSemantics",
+    products: [
+        // Products define the executables and libraries produced by a package, and make them visible to other packages.
+        .library(
+            name: "SwiftSemantics",
+            targets: ["SwiftSemantics"]
+        ),
+    ],
+    dependencies: [
+        // Dependencies declare other packages that this package depends on.
+        .package(name: "SwiftSyntax",
+                 url: "https://github.com/apple/swift-syntax.git",
+                 .revision("release/5.5")),
+    ],
+    targets: [
+        // Targets are the basic building blocks of a package. A target can define a module or a test suite.
+        // Targets can depend on other targets in this package, and on products in packages which this package depends on.
+        .target(
+            name: "SwiftSemantics",
+            dependencies: ["SwiftSyntax"]
+        ),
+        .testTarget(
+            name: "SwiftSemanticsTests",
+            dependencies: ["SwiftSemantics"]
+        ),
+    ]
+)
diff --git a/Sources/SwiftSemantics/Declarations/Class.swift b/Sources/SwiftSemantics/Declarations/Class.swift
index f8df0d4..b143191 100644
--- a/Sources/SwiftSemantics/Declarations/Class.swift
+++ b/Sources/SwiftSemantics/Declarations/Class.swift
@@ -71,7 +71,13 @@ extension Class: ExpressibleBySyntax {
     public init(_ node: ClassDeclSyntax) {
         attributes = node.attributes?.compactMap{ $0.as(AttributeSyntax.self) }.map { Attribute($0) } ?? []
         modifiers = node.modifiers?.map { Modifier($0) } ?? []
+
+        #if swift(>=5.5)
+        keyword = node.classOrActorKeyword.text.trimmed
+        #else
         keyword = node.classKeyword.text.trimmed
+        #endif
+
         name = node.identifier.text.trimmed
         inheritance = node.inheritanceClause?.inheritedTypeCollection.map { $0.typeName.description.trimmed } ?? []
         genericParameters = node.genericParameterClause?.genericParameterList.map { GenericParameter($0) } ?? []